When to Fertilize Tomato Plants

Tomato plants are a popular crop for home gardeners, but they require proper care to ensure a bountiful harvest. Fertilizing is an important aspect of growing healthy tomato plants, but timing is crucial for optimal results.

Before Planting

Before planting tomato seedlings, it’s important to prepare the soil by adding nutrients. Incorporate compost or aged manure into the soil to improve drainage and provide a slow release of essential nutrients. Additionally, consider adding a balanced fertilizer high in phosphorus, such as 10-10-10 or 5-10-5. Work the fertilizer into the soil and rake smooth.

First Fertilization

Two to three weeks after planting, it’s time to give the tomato plants their first feeding. Use a balanced fertilizer, such as 10-10-10, and apply at a rate of 2-3 tablespoons per plant. Apply the fertilizer evenly around the base of the plant and water well immediately after. This will give the plants an initial boost of nutrients to promote growth and fruit development.

Mid-Season Fertilization

Once the tomato plants begin to set fruit, it’s important to continue fertilizing for optimal growth and yield. Apply a balanced fertilizer, such as 10-10-10, at a rate of 1-2 tablespoons per plant every three to four weeks. Be sure to water well after applying to prevent fertilizer burn, which can damage plant roots and leaves.

Final Fertilization

At the end of the growing season, it’s important to prepare the tomato plants for winter dormancy. Stop fertilizing the plants approximately four weeks before the first expected frost date. This will allow the plants to begin naturally shutting down and preparing for winter. However, if there are any green tomatoes still on the plant, they may continue to ripen after the first frost if covered with fabric row covers or blankets.

Conclusion

Fertilizing tomato plants is an important aspect of growing healthy and fruitful plants. Following the proper fertilization schedule, including before planting, first feeding after planting, mid-season fertilization, and final fertilization before winter dormancy, will help ensure a bountiful harvest of delicious tomatoes. Remember to always water well after fertilizing to prevent plant damage and to read the instructions on fertilizer packages before applying to avoid over-fertilization.